[K3PZN-List] Wire antennas

[Scott, KB3JQQ]

A G5RV and a Carolina Window are both Off Center Fed (OCF)dipoles fed by a certain amount of ladder line. In theseantennas, the feedline is part of the antenna and the match.

      From: Curt Milton via K3PZN-List <k3pzn-list at mailman.qth.net>
 To: Carroll County Amateur Radio Club <k3pzn-list at mailman.qth.net> 
Cc: Curt Milton <wb8yyy at yahoo.com>
 Sent: Monday, March 28, 2016 9:55 PM
 Subject: Re: [K3PZN-List] Wire antennas
   
Kyle
the shape of the antenna has some influence on the radiation pattern.  however, for HF antennas mostly or partly horizontal -- the presence of the earth below can reduce the directional pattern of the antenna.  

a dipole that is straight, and more than a half wavelength above the ground will have a figure 8 type pattern, with less RF pointed along the axis of the antenna.  an inverted V will be less directional.  

circle antennas?  I don't know how common a circle is on HF.  a loop of wire that is square or a circle that is about one full wavelength total circumference will make a nice antenna also.  they will have a slightly louder signal close-in.  they have interesting properties at higher frequencies (where the antenna can be matched).  are you thinking of a circle parallel to the earth?  

back to Jim's earlier comment -- you can have a blast with most any good, simple antenna.  the complication is feeding it with a long piece of coax -- the coax feed only works well when the antenna is nearly matched in impedance (aka low enough VSWR).  

on the dipole -- its popular because its easy to feed with coax.  now if you take a dipole and move its feedpoint off center - it no longer has the same match (or impedance) so it can be problem unless addressed by the design of how it is fed.  

many antenna possibilities -- both radiating pattern and feed impedance must be considered.  

73 Curt
 

    On Monday, March 28, 2016 8:55 PM, Kyle Thornton <kyle.3599 at outlook.com> wrote:
 

 Hi all,
Another question from my curious mind. How exactly do wire antennas and inverted Vees work. Can I put the legs anywhere or do they have to be in a straight line? What are these circle antennas are they any good? 
Kyle 
73 de KC3FMP - FM19KJ 
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